I2 because of the presence of vacant d– orbitals accepts electrons form
I ions to form I3 ions but F2 because of the absence of d – orbitals does not
accept electrons from F ions to form F3- ions.
Thursday, August 6, 2020
Why the elements of the second row (first short period) show a number of differences in properties from other members of their respective families?
The differences in the properties of the first member of a group from those of the other members are due to
(i) the smaller size of atom.
(ii) presence of one inner shell of two electrons and
(iii) absence of d – orbitals.
Why is nitrous oxide (N2O) used as an anaesthetic in dentistry?
N2O is used as an anaesthetic in dentistry because of its inertness.
Where is liquid nitrogen used for?
Liquid nitrogen is used as a refrigerant to preserve biological specimen, and also used for providing low temperature in super conductivity.
Why does H3PO3 acts as a reducing agent but H3PO4 does not?
H3PO3 contains one P H bond and hence acts as a reducing agent but H3PO4 does.
Which of the following is/are not known? PCl3, AsCl3, SbCl3, NCl5, BiCl5
(1) NCl5 (due to absence of
d-orbitals)
(2) BiCl5 (Bi5+ being an oxidizing
agent oxidizes Cl ion to Cl2 and Cl- ion being a reducing
agent reduces Bi5+ to Bi3+).
Related Questions:
(1) What are
"pyro" oxy acids?
(2) What are
"Ortho" or "Meta" oxyacids?
(3) What is structure of (HPO3) metaphosphoric acid?
(4) Why Meta Phosphoric acid always exit in a polymeric form?
(5) What are the
structural difference between oxides ( P4O6 and P4O10) of phosphorous?
(6) What are common
structural features of oxides (P4O6 and P4O10) of
phosphorous?
(7) What are the explanation of Different Bond length and
Bond Angle In P4O6 and P4O10 :
(8) What is
"calgon" ? Give structure and its uses?
(9) Structure of Oxy
acids of Phosphorous:
(10) What is
structure of (HPO3) metaphosphoric acid?
(11) What is
metaphophoric (HPO3)?
(12) Why polarity of Ammonia (NH3) is more than NF3 ?
(13) Why is nitrous oxide (N2O) used as an anaesthetic in
dentistry?
(14) Which is more
basic N(CH3)3 or N(SiH3)3 , explain?
(15) Trisilyl amine,
N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.
(16) What are
abnormal behaviour of Nitrogen atom as compared to other family members?
(17) What is product
obtained when N2O5 is treated with NaCl?
(18) Phosphorus can
form PCl5 but nitrogen can not form NCl5 why?
(18) Are all the five
bonds of PCl5 equivalent? Justify your answer.
(19) Why PCl3
hydrolysed while NCl3 can not be hydrolysed?
(20) Which of the following is/are not known? PCl3, AsCl3,
SbCl3, NCl5, BiCl5
(21) Why bond angle
of hydrides of group 15, decreases down the group?
(22) Why nitrogen
shows catenation properties less than phosphorus?
(23) Why Nitrogen is
fairly inert gas?
(24) Why Nitrogen (N2)
is less reactive at room temperature?
(25) Where is liquid nitrogen used for?
(26) Why Nitrogen
dioxide (NO2) dimerises to form Dinitrogen tetraoxide (N2O4)?
(27) Why Nitrogen
dioxide (NO2) is coloured but Dinitrogen tetraoxide (N2O4) is colourless?
(28) Which will
have very fast tendency to dimerized ClO2 or NO and
why?
(30) Why does H3PO3 acts as a reducing agent but H3PO4 does
not?
(31) Hypophosphorous
acid (H3PO2) and Phosphorous acid (H3PO3) act as as good reducing agents while
H3PO4 does not.Why?
Why bismuth has low m.p. while if going down the group m.p. increases?
This may presumably be due to more
tendency of Bi to form three rather than five covalent bonds (inert pair
effect). Thus there are weak forces of attraction between their atoms in
solid state, accounting for its low m.p.
Related
Questions:
Which is more basic N(CH3)3 or N(SiH3)3 , explain?
Are all the five bonds of PCl5 equivalent? Justify your
answer.
Trisilyl amine, N(SiH3)3 is planar whereas trimethyl
amines N(CH3)3 is pyramidal. Explain why?.
What are common structural features of oxides (P4O6 and
P4O5) of phosphorous?
What are the structural difference between oxides ( P4O6
and P4O10) of phosphorous?
What are abnormal behaviour of Nitrogen atom as compared
to other family members?
What is product obtained when N2O5 is treated with NaCl?
What is metaphophoric (HPO3)?
Phosphorus can form PCl5 but nitrogen can not form NCl5
why?
Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Why bond angle of hydrides of group 15, decreases down
the group?
What is "calgon" ? Give structure and its uses?
Why nitrogen shows catenation properties less than
phosphorus?
Why Nitrogen is fairly inert gas?
Why Nitrogen (N2) is less reactive at room temperature?
Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen
tetraoxide (N2O4)?
Why Nitrogen dioxide (NO2) is coloured but Dinitrogen
tetraoxide (N2O4) is colourless?
Which element among group 15 elements has lowest boiling point?
Nitrogen (N2)
Related
Questions:
Which is more basic N(CH3)3 or N(SiH3)3 , explain?
Are all the five bonds of PCl5 equivalent? Justify your
answer.
Trisilyl amine, N(SiH3)3 is planar whereas trimethyl
amines N(CH3)3 is pyramidal. Explain why?.
What are common structural features of oxides (P4O6 and
P4O5) of phosphorous?
What are the structural difference between oxides ( P4O6
and P4O10) of phosphorous?
What are abnormal behaviour of Nitrogen atom as compared
to other family members?
What is product obtained when N2O5 is treated with NaCl?
What is metaphophoric (HPO3)?
Phosphorus can form PCl5 but nitrogen can not form NCl5
why?
Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Why bond angle of hydrides of group 15, decreases down
the group?
What is "calgon" ? Give structure and its uses?
Why nitrogen shows catenation properties less than
phosphorus?
Why Nitrogen is fairly inert gas?
Why Nitrogen (N2) is less reactive at room temperature?
Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen
tetraoxide (N2O4)?
Why Nitrogen dioxide (NO2) is coloured but Dinitrogen
tetraoxide (N2O4) is colourless?
Hypophosphorous acid (H3PO2)
and Phosphorous acid (H3PO3) act as as good reducing agents while H3PO4 does
not.Why?Why white phosphorous is stored under water?
White phosphorous is very reactive and will spontaneously inflame in
air so it is stored under water.
Related
Questions:
Which is more basic N(CH3)3 or N(SiH3)3 , explain?
Are all the five bonds of PCl5 equivalent? Justify your
answer.
Trisilyl amine, N(SiH3)3 is planar whereas trimethyl
amines N(CH3)3 is pyramidal. Explain why?.
What are common structural features of oxides (P4O6 and
P4O5) of phosphorous?
What are the structural difference between oxides ( P4O6
and P4O10) of phosphorous?
What are abnormal behaviour of Nitrogen atom as compared
to other family members?
What is product obtained when N2O5 is treated with NaCl?
What is metaphophoric (HPO3)?
Phosphorus can form PCl5 but nitrogen can not form NCl5
why?
Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Why bond angle of hydrides of group 15, decreases down
the group?
What is "calgon" ? Give structure and its uses?
Why nitrogen shows catenation properties less than
phosphorus?
Why Nitrogen is fairly inert gas?
Why Nitrogen (N2) is less reactive at room temperature?
Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen
tetraoxide (N2O4)?
Why Nitrogen dioxide (NO2) is coloured but Dinitrogen
tetraoxide (N2O4) is colourless?
Which allotrope of phosphorous is used on top head of match stick?
Red Phosphorous is used on top head of match stick.
Related
Questions:
Which is more basic N(CH3)3 or N(SiH3)3 , explain?
Are all the five bonds of PCl5 equivalent? Justify your
answer.
Trisilyl amine, N(SiH3)3 is planar whereas trimethyl
amines N(CH3)3 is pyramidal. Explain why?.
What are common structural features of oxides (P4O6 and
P4O5) of phosphorous?
What are the structural difference between oxides ( P4O6
and P4O10) of phosphorous?
What are abnormal behaviour of Nitrogen atom as compared
to other family members?
What is product obtained when N2O5 is treated with NaCl?
What is metaphophoric (HPO3)?
Phosphorus can form PCl5 but nitrogen can not form NCl5
why?
Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Why bond angle of hydrides of group 15, decreases down
the group?
What is "calgon" ? Give structure and its uses?
Why nitrogen shows catenation properties less than
phosphorus?
Why Nitrogen is fairly inert gas?
Why Nitrogen (N2) is less reactive at room temperature?
Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen
tetraoxide (N2O4)?
Why Nitrogen dioxide (NO2) is coloured but Dinitrogen
tetraoxide (N2O4) is colourless?
Hypophosphorous acid (H3PO2)
and Phosphorous acid (H3PO3) act as as good reducing agents while H3PO4 does
not.Why?Why the first ionization energy of group 15 elements much higher than those of corresponding group 14 elements?
The
first ionization energy of group 15 elements much higher than those of
corresponding group 14 elements this is due to increase in nuclear charge and
extra stable configuration of the elements of this group. The extra stability
of configuration is attributed to the exactly half filled p – orbitals in their
valence shells.
Related
Questions:
Which is more basic N(CH3)3 or N(SiH3)3 , explain?
Are all the five bonds of PCl5 equivalent? Justify your
answer.
Trisilyl amine, N(SiH3)3 is planar whereas trimethyl
amines N(CH3)3 is pyramidal. Explain why?.
What are common structural features of oxides (P4O6 and
P4O5) of phosphorous?
What are the structural difference between oxides ( P4O6
and P4O10) of phosphorous?
What are abnormal behaviour of Nitrogen atom as compared
to other family members?
What is product obtained when N2O5 is treated with NaCl?
What is metaphophoric (HPO3)?
Phosphorus can form PCl5 but nitrogen can not form NCl5
why?
Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Why bond angle of hydrides of group 15, decreases down
the group?
What is "calgon" ? Give structure and its uses?
Why nitrogen shows catenation properties less than
phosphorus?
Why Nitrogen is fairly inert gas?
Why Nitrogen (N2) is less reactive at room temperature?
Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen
tetraoxide (N2O4)?
Why Nitrogen dioxide (NO2) is coloured but Dinitrogen
tetraoxide (N2O4) is colourless?
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